haozhu233/kableExtra: Rainbow bomb

kableExtra 0.6.0

• Added cell_spec for HTML & LaTeX

• Added helper functions including spec_color, spec_font_size, spec_angle, spec_tooltip & spec_popover to facilitate the cell_spec function.

• Added align/rotate/font_size to row_spec

• Allowed row_spec to modify header row with row_spec(0, ...)

• Improved repeat_header in LaTeX for longtables. Now you can write texts like "continued on next page"

• Fixed a critical bug with latex group_rows (#68)

• Escape question mark ? in regex_escape (thanks @nichtleiter)

• Switched from readr::write_file to base::writeLines (for support in earlier version of readr)

• Switched from sub to str_replace in some places due to a bug in sub on Windows.